The singer has some fun in a Malibu store. Plus: Anna Kournikova, Missy Elliott, Christina Aguilera and more

MINI-SPEARS

Britney's lookalike little sis, Jamie-Lynn Spears, enjoys her own moment in the limelight outside the Late Show with David Letterman studio in New York City on Thursday. The 13-year-old actress promoted her new Nickelodeon sitcom Zoey 101, which premieres Sunday.